@ Mago -- If you're asking about the Gizmodo mention, it happened on a Friday (right before the weekend) so there's no way to know if that helped sales at all (guessing not). But it was personally rewarding because I like the blog :-)

Moving from "New and Notable" to "What's Hot" = no perceptible sales increase.

Although a few days back, I did get contacted by an iPad accessory company that wants to use some art from PLEXXR on their packaging. That was a nice surprise.

No compensation -- just credit/mention on the package and Web site, and the opportunity to review what they're planning (so they don't do something irritating like slap an angry bird down in the middle of a puzzle :-)